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    • Performance evaluation of a hybrid OBS/OCS network with QoS differentiation based on packet loss/delay requirements 

      Perelló Muntan, Jordi; Guinea, Nuria de; Spadaro, Salvatore; Junyent Giralt, Gabriel; Comellas Colomé, Jaume (2010)
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      This paper introduces and evaluates a hybrid OBS/OCS switch for Quality of Service (QoS) differentiation in next-generation all-optical transport networks. Depending on their QoS requirements, incoming IP packets are ...

    • Performance evaluation of an all-optical OCS/OPS-based network for intra-data center connectivity services 

      Pagès Cruz, Albert; Jiménez, Sergio; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      As the size of Data Centers (DCs) and the amount of information managed by them grows, nowadays electronic-based intra-Data Center Networks (DCNs) start to become a limiting factor, not providing enough scalability nor ...

    • Performance evaluation of an all-optical OCS/OPS-Based network for intra-data center connectivity services 

      Pagès Cruz, Albert; Jiménez Feijóo, Sergio; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      As the size of Data Centers (DCs) and the amount of information managed by them grows, nowadays electronic-based intra-Data Center Networks (DCNs) start to become a limiting factor, not providing enough scalability nor ...

    • Performance issues in Optical Burst/Packet Switching 

      Klinkowski, Miroslaw; Careglio, Davide; Aracil Rico, Javier; Azodolmolky, Siamak; García Haro, Juan; Gunreben, Sebastian; Hu, Guoqiang; Izal, Mikel; Kimsas, Andreas; Veiga Gontán, Javier; Tzanakaki, Anna; Tomkos, Ioannis; Spadaro, Salvatore; Scharf, Joachim; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Morató, Daniel; Magaña, Eduardo; Köhn, Martin (Springer, 2009-04-01)
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      This chapter summarises the activities on optical packet switching (OPS) and optical burst switching (OBS) carried out by the COST 291 partners in the last 4 years. It consists of an introduction, five sections with ...

    • Planning of optical and IT resources for efficient virtual infrastructure embedding 

      Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2012)
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      This work addresses the offline problem of efficiently planning network substrates joining geographically distributed IT resource locations over high-capacity optical resources. Given an already known set of virtual ...

    • Practical spectral efficiency estimation for optical networking 

      Gené Bernaus, Joan M.; Perelló Muntan, Jordi; Cho, Junho; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      Assigning the right spectral resources is the key to flex-grid optical networking. Finding the optimal spectral allocation is a daunting task, as there are many variables at play that make accurate network models very ...

    • Reducing the number of transceivers with probabilistic constellation shaping in flex-grid over MCF optical backbone networks 

      Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Cho, Junho; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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      This paper quantifies the potential reduction in the number of required transceivers that the use of probabilistic constellation shaping (PCS) can bring to Flex-Grid over multicore fiber (MCF) optical backbone networks, ...

    • Resource orchestration in SDN-based future optical data centres 

      Spadaro, Salvatore; Pagès Cruz, Albert; Agraz Bujan, Fernando; Montero, Rafael; Perelló Muntan, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      Data center (DC) infrastructures are a key element for nowadays Internet and cloud services. However, due to the increase of traffic that DCs have to manage, optical-based network architectures are being investigated to ...

    • Results and achievements of the ALLIANCE Project: New network solutions for 5G and beyond 

      Careglio, Davide; Spadaro, Salvatore; Cabellos Aparicio, Alberto; Lázaro Villa, José Antonio; Barlet Ros, Pere; Gené Bernaus, Joan M.; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Suárez-Varela Maciá, José Rafael; Pagès Raventós, Albert; Paillissé Vilanova, Jordi; Almasan Puscas, Felician Paul; Domingo Pascual, Jordi; Solé Pareta, Josep (Multidisciplinary Digital Publishing Institute, 2021-09-30)
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      Leaving the current 4th generation of mobile communications behind, 5G will represent a disruptive paradigm shift integrating 5G Radio Access Networks (RANs), ultra-high-capacity access/metro/core optical networks, and ...

    • Route, modulation format, MIMO and spectrum assignment in Flex-Grid/MCF transparent optical core networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018-08-15)
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      In this paper, we target an optimal multiple-input multiple-output digital signal processing (MIMO-DSP) assignment to super-channels affected by intercore crosstalk (ICXT) in multicore fiber (MCF) enabled transparent optical ...

    • Scalable hybrid path computation procedure for PCE-based 

      Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (2011)
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      In the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network ...

    • Scalable hybrid path computation procedure for PCE-based multi-domain WSON networks 

      Hernández Sola, Guillem; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Spadaro, Salvatore; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE, 2011)
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      In the Hierarchical Path Computation Element (H-PCE) architecture, an optimum end-to-end path is computed using a hierarchical relationship among PCEs. An H-PCE-based path computation procedure provides low network blocking ...

    • Scalable topological forwarding and routing policies in RINA-enabled programmable data centers 

      Leon Gaixas, Sergio; Perelló Muntan, Jordi; Careglio, Davide; Grasa, Eduard; Lopez, Diego; Aranda Gutiérrez, Pedro Andrés (Wiley-Blackwell, 2017-11-19)
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      Given the current expansion of cloud computing, the expected advent of the Internet of Things, and the requirements of future fifth-generation network infrastructures, significantly larger pools of computational and storage ...

    • SDN-based parallel link discovery in optical transport networks 

      Montero Herrera, Rafael; Agraz Bujan, Fernando; Pagès Cruz, Albert; Perelló Muntan, Jordi; Spadaro, Salvatore (Wiley-Blackwell, 2018-01-01)
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      The use of optical technologies in modern network scenarios has increased in the last decade, mostly due to their support in crucial networking topics (ie, bandwidth and scalability). In parallel, these scenarios have also ...

    • SDN-enabled flexible optical node designs and transceivers for sustainable metroaccess networks convergence 

      Sarmiento Hernández, Samael; Montero Herrera, Rafael; Altabas, Jose Antonio; Izquierdo, David; Agraz Bujan, Fernando; Pagès Cruz, Albert; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Alonso Varela, Marc; Pascual, Álvaro; Garces, Ignacio; Spadaro, Salvatore; Lázaro Villa, José Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
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      The Internet data traffic constant growth caused by the popularization of cloud services, mobile and social networks, is being stressed by the advent of 5G technologies. Hence, architectural changes are required at the ...

    • SDN-enabled OPS with QoS guarantee for reconfigurable virtual data center networks 

      Miao, Wang; Agraz Bujan, Fernando; Peng, Shuping; Spadaro, Salvatore; Bernini, Giacomo; Perelló Muntan, Jordi; Zervas, Georgios; Nejabati, Reza; Ciulli, Nicola; Simeonidou, Dimitra; Dorren, Harm; Calabretta, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2015-07-01)
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      Optical packet switching (OPS) can enhance the performance of data center networks (DCNs) by providing fast and large-capacity switching capability. Benefiting from the software-defined networking (SDN) control plane, which ...

    • SDN-enabled programmable optical packet/circuit switched intra data centre network 

      Guo, Bingli; Peng, Shuping; Jackson, Chris; Agraz Bujan, Fernando; Perelló Muntan, Jordi; Spadaro, Salvatore; Nejabati, Reza (Institute of Electrical and Electronics Engineers (IEEE), 2015)
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      We demonstrated an SDN-enabled optical DCN leveraging AoD, OPS, FPGA-based ToR with extended OpenDayLight controller and extended OF protocol. Experimental results show application-aware OCS/OPS connection provisioning ...

    • Service and resource differentiation in shared-path protection environments to maximize network operator's revenues 

      Velasco Esteban, Luis Domingo; Ruiz Ramírez, Marc; Perelló Muntan, Jordi; Spadaro, Salvatore; Comellas Colomé, Jaume (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-02)
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      Network operators are facing hard competition for opportunities in the telecommunications market, forcing network investments to be carefully evaluated before the decision-making process. A great part of core network operators’ ...

    • Some open issues in multi-domain/multi-operator/multi-granular ASON/GMPLS networks 

      Spadaro, Salvatore; Velasco Esteban, Luis Domingo; Perelló Muntan, Jordi; Agraz Bujan, Fernando; Comellas Colomé, Jaume; Junyent Giralt, Gabriel (IEEE, 2009-07-31)
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      Large optical backbone networks may be composed of several domains, each one controlled by different administrators/operators. Besides, the bandwidth granularity of these domains may be different. Label Switched Paths ...

    • Space continuity constraint in dynamic Flex-Grid/SDM optical core networks: An evaluation with spatial and spectral super-channels 

      Rumipamba Zambrano, Rubén Darío; Moreno Muro, Francisco Javier; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Spadaro, Salvatore (Elsevier, 2018-08)
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      Space Division Multiplexing (SDM) appears as a promising solution to overcome the capacity limits of single-mode optical fibers. In Flex-Grid/SDM optical networks, nodes offering full interconnection between input/output ...